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Wideband op-amps expand video’s horizons

South Portland, Maine&#8212Fairchild Semiconductor's first entries into the high-performance op-amp market include five new devices in the company's 210 MHz FHP3x50 and 50 MHz FHP3x30 families that
tout the industry's best power and performance features for high definition (HD) and standard definition (SD) video applications.

“The FHP3x30 family, for example, provides the lowest available power consumption combined with 33 percent higher bandwidth, 33 percent more output current and 55 percent better DC performance than comparable devices,” said Debbie Brandenburg, marketing engineer. “And our FHP3x50 family offers best-in-class input bias current, which is an order of magnitude better than any other device in this performance range.” Both families provide 1.5 kV ESD protection.



These ultra-low capacitance, complementary bipolar devices use the company's BCP6T technology, which employs silicon-on-insulator (SOI) and deep trench isolation (DTI) technologies. The triple- and quad-channel FHP3x50 devices are designed to optimize bandwidth in high-speed applications such as HD set-top boxes. These 210 MHz, full-power bandwidth (-3dB) op-amps, with a slew rate of 1100 volts/microsecond, exceed HD video requirements. The devices sport a differential gain/phase error of 0.07 percent/0.03 degree for improved video quality. Gain flatness holds to 0.1 dB over 50 MHz. The op-amps' low (0.05 microamp typical) input bias-current contributes to higher DC output accuracy and minimal droop in AC-coupled applications.

Both devices in Fairchild’s 210 MHz family operate with just 3.6 mA of supply current per amplifier; the triple-channel device offers a disable feature to prevent additional power consumption. These devices are rated for an output current of &plusmn55 mA, which is suited to driving multiple video loads. The FHP3x50 products are also well suited for use in DTVs, audio/video (A/V) amps and projectors and DVD recorders.

The single-, dual- and quad-channel devices in the FHP3x30 family tout 50 MHz (-3dB) bandwidth, 110 volts/microsecond slew rate, and 0.008 percent/0.01 degree differential gain/phase. Targeted applications include SD set-top boxes, DTVs, CCD imaging systems and industrial imaging systems. The FHP3230 device claims the market’s best unity-gain bandwidth (170 MHz, versus the 130 MHz of competing devices), output current (100 vs. 75 mA) and DC performance (CMRR of 100 dB, versus 88 dB) at the lowest power consumption (2.5 vs. 2.7 mA).

Gain flatness is 0.1 dB over 16MHz. These devices, rated at &plusmn100 mA for four video loads, operate with just 2.5 mA supply current per amplifier. Additional features include an open loop gain (AOL), power supply rejection ratio (PSRR), and common-mode rejection ratio of better than 100 dB for improved dynamic range and gain accuracy.



Click here for the FHP3130/3230/3430's preliminary datasheets (similarly, key in FHP3350 for the 3350/3450's datasheets). The FHP3130 (SOT23-5, SOIC-8 packages) is 49 cents each in 1k pieces, the FHP3230 (MSOP-8, SOIC-8) is 63-74 cents, and the FHP3430 (SOIC-14, TSSOP-14) is 86 cents. The FHP3350 (SOIC-14, TSSOP-14) is 71 cents, and the FHP3450 (SOIC-14, TSSOP-14) is 83 cents.

Fairchild Semiconductor , 1-800-341-0392 www.fairchildsemi.com

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